The STELLARS have tweeter and midrange controls that are completely
adjustable from 0 to full output. For ease of operation they are
calibrated in dB, the center position being the most average setting for
a standard room of 12x15 feet with rugs, drapes and some furniture. A
combination of test equipment and listening tests were used to determine
the best middle setting.

It is well known that any speaker that has been tested flat in a special
anechoic chamber with a microphone will have frequency response variations
as much as 10-20dB when placed in a room. Also a person's hearing is
not flat. Each one of us hears sounds differently and in a logarithmic
fashion, emphasizing some frequencies and attenuating others all at
different volume levels. We do not listen to speakers in special chambers
or with microphones. A microphone just cannot simulate what a person hears
with two ears and a brain. Also musical and sonic tastes vary widely.

The STELLARS are designed to operate in this real word environment
and so to compensate for some of these variations the "Smooth Adjustable
Response" (SAR) controls were developed. Very few speakers, if any,
have this range of adjustments.